//=============================================================================
//                                                                            
//                               OpenMesh                                     
//      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen       
//                           www.openmesh.org                                 
//                                                                            
//-----------------------------------------------------------------------------
//                                                                            
//                                License                                     
//                                                                            
//   This library is free software; you can redistribute it and/or modify it 
//   under the terms of the GNU Library General Public License as published  
//   by the Free Software Foundation, version 2.                             
//                                                                             
//   This library is distributed in the hope that it will be useful, but       
//   WITHOUT ANY WARRANTY; without even the implied warranty of                
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         
//   Library General Public License for more details.                          
//                                                                            
//   You should have received a copy of the GNU Library General Public         
//   License along with this library; if not, write to the Free Software       
//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 
//                                                                            
//-----------------------------------------------------------------------------
//                                                                            
//   $Revision: 1.2 $
//   $Date: 2005-12-21 13:51:57 $
//                                                                            
//=============================================================================

#ifndef OPENMESH_MESH_ITEMS_HH
#define OPENMESH_MESH_ITEMS_HH


//== INCLUDES =================================================================


#include <Core/System/config.hh>
#include <Core/Utils/GenProg.hh>
#include <Core/Utils/vector_traits.hh>
#include <Core/Mesh/Kernels/Common/Handles.hh>


//== NAMESPACES ===============================================================


namespace OpenMesh {


	//== CLASS DEFINITION =========================================================

	/// Definition of the mesh entities (items).
	template 
		<
			class InternalItems, 
			class Traits,
				bool  IsTriMesh
		>
	struct FinalMeshItemsT
	{

		//--- build Refs structure ---
#ifndef DOXY_IGNORE_THIS
		struct Refs
		{
			typedef typename Traits::Point            Point;
			typedef typename vector_traits<Point>::value_type Scalar;

			typedef typename Traits::Normal           Normal;
			typedef typename Traits::Color            Color;
			typedef typename Traits::TexCoord1D       TexCoord1D;
			typedef typename Traits::TexCoord2D       TexCoord2D;
			typedef typename Traits::TexCoord3D       TexCoord3D;

			typedef OpenMesh::VertexHandle    VertexHandle;
			typedef OpenMesh::HalfedgeHandle  HalfedgeHandle;
			typedef OpenMesh::EdgeHandle      EdgeHandle;
			typedef OpenMesh::FaceHandle      FaceHandle;
		};
#endif



		//--- export Refs types ---

		typedef typename Refs::Point           Point;
		typedef typename Refs::Scalar          Scalar;
		typedef typename Refs::Normal          Normal;
		typedef typename Refs::Color           Color;
		typedef typename Refs::TexCoord1D      TexCoord1D;
		typedef typename Refs::TexCoord2D      TexCoord2D;
		typedef typename Refs::TexCoord3D      TexCoord3D;



		//--- get attribute bits from Traits ---

		enum Attribs
		{ 
			VAttribs = Traits::VertexAttributes,
			HAttribs = Traits::HalfedgeAttributes,
			EAttribs = Traits::EdgeAttributes,
			FAttribs = Traits::FaceAttributes 
		};



		//--- merge internal items with traits items ---

		typedef typename InternalItems::Vertex                     InternalVertex;
		typedef typename Traits::template VertexT<InternalVertex, Refs>  Vertex;


		typedef typename GenProg::IF<
			(bool)(HAttribs & Attributes::PrevHalfedge),
			typename InternalItems::Halfedge_with_prev,
			typename InternalItems::Halfedge_without_prev
		>::Result   InternalHalfedge;
		typedef typename Traits::template HalfedgeT<InternalHalfedge, Refs>
			Halfedge;


		typedef typename InternalItems::template Edge<Halfedge>      InternalEdge;
		typedef typename Traits::template EdgeT<InternalEdge, Refs>  Edge;


		typedef typename InternalItems::template Face<IsTriMesh>     InternalFace;
		typedef typename Traits::template FaceT<InternalFace, Refs>  Face;
	};


	//=============================================================================
} // namespace OpenMesh
//=============================================================================
#endif // OPENMESH_MESH_ITEMS_HH defined
//=============================================================================

